Brush



Aug. 6,1935.' C; E. FROST 2,010,691

BRUSH Filed Oct. 14, 1950 I N VEN TOR.

ETEN#- Patented ug. 6, 1935 ,UNITED STATES PATENT OFFICE BRUSH Application October 14, 1930, Serial No. 488,582

4 Claims. (Cl. 15--181)Q 'I'his invention relates to an improved brush of the type generally known in the art as sectional brushes, in which a number of disc-like sections are arranged in axial alinement and clamped together, the entire assembly producing a cylindrical brush adapted to be rotated by a machine, for many types of cleaning, polishing and the like.

An object of the invention is to provide an `improved circular brush. Y

Another object is to provide an improved brush in which the filaments will be uniformly distributed. l

Another object is to provide an improved brush which may be veasily and economically manufactured. i

Another object is to provide an improved brush which may be used with reither vegetable fiber or metal. filaments.

Other objects will hereinafter appear.

The invention will be better understood from the description of three practical embodiments thereof illustrated in the accompany drawing, in which;

Figure 1 is a central sectional View of the component parts of one embodiment of my invention;

Figure 2 is a fragmentary View of the blank from which the retaining member is made;

Figure 3 is a fragmentary view of the blank from which the central supporting disc is produced;

Figure 4 is a fragmentary view similar to Figure 1 showing the parts in assembled relation before being locked together.

Figure 5 is a View similar to Figure 4 but showing the parts after being locked in finished position;

Figure 6 is a View similar to Figure 1 showing a modified embodiment of the invention;

Figure 7 is a View similar toFigure 4 of the embodiment of Figure 6;

Figure 8 is a View similar to Figure 5 of the embodiment of Figure 6; and

Figure 9 is a view similar to Figures 5 and 8 of another embodiment of the invention.

Referring first to the embodiment of Figures 1 to 5, the brush comprises a plurality of circumferentiallyarranged filaments i bent into substantially U-shape. Through the bight of each of the filaments extends circumferential wire or ring 2, the filaments and wire being arranged about a retaining member which consists of a central strip 3 having projecting lugs 4 each provided at its outer end with a prong 5. The strip is formed as shown in Figure 2 and thereafter the prongs are bent to a position normal to the lugs 4l and the lugs themselves bent upwardly as illustrated in Figure 4 so that the tufts of filaments and wires may be inserted between them.

A central disc 6 having peripherally arranged lugs 6a which are bent normal to the surface of the disc and alternating in direction, is positioned within the retaining member, and two frustro-conical rings l and 8 are positioned at the sides of the retaining member, and exteriorly the lugs-5a. These parts, as most clearly seen in Figure 4, form a substantially sheave-shaped member, the plates 5 constituting a disc-like Wheel portion, while the rings 'l and 8 define a V-shaped peripheral groove. After the sheaveshaped member has been assembled, this groove has positionedwithin it the looped portion of the filaments and the wire ring 2, the loops of the filaments resting upon strip 3 and .between rings 'l and 8. With the parts thus arranged, as shown in Figure 4, pressure is applied by means of suitable dies to the sides of the device, which moves the parts to the position shown in Figure 5. From this figure, it will be noted that the rings l and 8 have been flattened and the lugs 6a have been bent about the inner margins of these rings to firmly clamp them together. The sheave-shaped member still has a peripheral groove with its sides now radial and closer together than they were during the filling operation, the sides tightly embracing the filaments.

At the same time the prongs 5 have been driven through the mass of filaments, overlying the wire 2, the ends of the prongs, if these are longer than the distance between rings 1 and 8, being clinched over, so that the prongs firmly retain the tufts of filaments of wire within the rings and prevent circumferential displacement of the filaments. The clinching of the ends of the prongs is not essential to the proper retention of the filaments and wire ring, but does not impair the firm retention of these elements. It is, therefore, possible to use a single length of prong for brushes of different thicknesses, the prongs bending over in the case of the narrower brushes but lying straight in the case of the wider sections. This permits sections to be produced of much greater thickness than has been possible heretofore, fills of an inch or more in thickness being firmly retained.

By the invention above described, a brush or section is produced which is better balanced than prior sections, is easier and more economical to manufacture, retains the filaments better, and in which, due to thicker fills, requires less sections fora given length of assembled brush.

In the Figures 6, '7, and 8, a central disc I5 is provided which has a circular circumference smaller than the interior of the retainer 3, while two frusto-conical rings ll and I8 are provided with spaced lugs I6. The parts are assembled as shown in Figure 7, the lugs of the two rings alternating, and when pressure is applied, the lugs are flattened to overlie and clamp the margin of disc l5, as shown in Figure 8, the wires and pronged retainer acting as in the embodiment above described.

In Figure 9 a modication of the brush of Figures 6 to 8 is illustrated in which the filaments are arranged in a conical form rather than a circular one, producing a brush or section which is particularly adapted for use in the bottoms of depressions and the like.

While I have described the illustrated embodiment of my invention in some particularity, this is done by way of illustration only, it being obvious that many other embodiments will readily occur to those skilled in this art, and I do not, therefore, limit myself to the precise details shown and described, but claim as my invention all embodiments, variations and modifications coming within the scope of the subjoined claims.

VI claim:

1. The method of forming a circular brush which comprises assembling two dished rings and a central disc to form a generally Sheave-shaped sheet metal supporting member, positioning a retaining ring into the peripheral groove thereof,

, the ring having outwardly diverging pronged lugs on its edges, positioning the looped portion of a plurality of tufts of filaments within the groove and between the lugs, arranging a central ring within the loops of said filaments, and then sub- `jecting the assembled device to lateral pressure to atten the dished rings tightly upon the mass of filaments and to simultaneously cause the prongs to pass into said mass of laments and overlie said central ring, and clamping the flattened rings together and to the disc.

2. A circular brush comprising a central hub and two annular' side plates, means clamping said hub and side plates together, an integral annular channel-shaped retaining member disposed between said side plates having its open side facing outwardly, the side anges of the channel being notched and provided with prongs extending inwardly substantially normally to said side ilanges, and a series of filaments clamped Within said annular member.

3. A circular brush comprising a central hub and two annular side plates, means clampingsaid hub and side plates together, an integral annular -channehshaped retaining member disposed between said side plates having its open side facing outwardly, the side flanges of the channel being notched and provided with prongs extending inwardly substantially normally to said side anges and lying substantially in planes including the axis of the brush, and a series of filaments clamped within said annular member.

4. A circular brush comprising a central hub and two annular side plates, means clamping said hub and side plates together, an integral annular channel-shaped retaining member disposed between said side plates having its open side facing outwardly, the side flanges of the channel being notched and provided with prongs extending inwardly substantially normally to said side flanges, a series of laments clamped within said annular member, the iilaments being looped with their loops disposed within the channel-shaped member, and a ring disposed through the bottom of said loops beneath said prongs.

CLINTON E. FROST. 

